'When I build someone else's code it says `Package Qt5Gui was not found in the pkg-config search path` but i installed it

I have installed Qt 5.1.4 but when I 'make install' it shows

Package Qt5Gui was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Gui.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Gui' found
Package Qt5Widgets was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Widgets.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Widgets' found
Package Qt5Multimedia was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Multimedia.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Multimedia' found

But I installed this software qt-opensource-linux-x64-5.14.0.run, after I tried to find them I ran locate Qt5Gui but no Qt5Gui.pc returned,so how can i get Qt5*.pc on my ubuntu 20.04 ?

cmakemakefileqt5


Solution 1:[1]

The installation I started was missing a few more packages

The complete installation should look like this


sudo apt install qtmultimedia5-dev qt5-default -y

The construction of the qt compilation environment requires more than the installation package downloaded from the official website

It worked for me !

Now i can find the Qt5*.pc !

Solution 2:[2]

You need to install qtbase5-dev which is part of qt5-default

see: https://packages.ubuntu.com/bionic/amd64/qtbase5-dev/filelist

EDIT: you may also have to install the package qtmultimedia5-dev.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 user10736820
Solution 2

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